Improves the quality of production and especially the growth and ripening of fruits and vegetables. Its special composition and osmoregulatory action make the product very effective in critical stages of plant growth that seeks potassium administration, enhances plant resistance to dehydration, heat or salinity and improves the organoleptic characteristics of ripening fruits: high ripening sugars, good color, weight and size of fruit without stress impact due to the high content of the amino acid proline. Its application is important during the development of the seeds and at the beginning of the ripening of the fruits or swelling of the storage organs (bulbs, tubers, rhizomes).